lib/prog_loaders.c: Clean up includes

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I00e9636fa49c402f38119ba0bfc85c8c193fec12
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68052
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

src/lib/prog_loaders.c

@@ -9,11 +9,10 @@
 #include <program_loading.h>
 #include <reset.h>
 #include <rmodule.h>
+#include <security/vboot/vboot_common.h>
 #include <stage_cache.h>
 #include <symbols.h>
-#include <thread.h>
 #include <timestamp.h>
-#include <security/vboot/vboot_common.h>
 
 void run_romstage(void)
 {